Bitmap

Bitmaps work by dividing up an image into a grid
(which may be rectangular or square).
For each cell on the grid ("pixel"),
the lightness, darkness or color is recorded.

Here is an example of a bitmap image:

If we zoom in (enlarge the bitmap) so that we can see the individual
pixels, it looks like this:

Bitmaps are widely used by computers and peripherals, both as
a permanent storage format (see Bitmap File Formats),
and in computer memory for displaying and manipulating images.

One disadvantage of bitmaps is that they have little built-in intelligence.
For example, if I have a bitmap picture of a house, there is no easy way
to pick up or work with all the
pixels that correspond to (for example)
the roof: While one might think one could simply pick up all "roof-colored"
pixels, what happens if the roof is shaded
with multiple colors?

Another disadvantage of working with bitmaps, is there can be some odd effects
if they are scaled up (enlarged) or scaled down (shrunk):

If a bitmap is scaled up, it will appear to have jagged
edges (see "Jaggies").

If a bitmap is scaled down, then as there will be less
pixels after scaling, but each
pixel can only contain a single
color, some data (usually fine detail) will be lost. We discuss
this issue in more detail, in our article on
Anti-Aliased Scaling.

Discuss Bitmap

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By Gavin Ambrose

Brand: Fairchild BooksReleased: 2006-11-15Paperback (288 pages)

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The Visual Dictionary of Graphic Design is a comprehensive guide to the numerous terms used within graphic design and associated disciplines.

Over 250 terms are explained and contextualized, with concise definitions accompanied by illustrations and examples taken from historical and contemporary graphic design.

The dictionary covers traditional practice and process terms as well as modern terminology. It also defines a wide variety of practical terms, such as Perfect binding, Deboss and Strikethrough, as well as movements and styles including Surrealism, Psychadelia and Postmodernism.

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By Roger Stevens

Brand: Charles River MediaHardcover (460 pages)

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Product Description:The popularity of special effects movies and the video game industry has introduced thousands of new terms, techniques, and software applications to both the computing professional and the general user. Unfortunately, these graphics creations represent a convergence of expertise from several different subject areas, resulting in a lack of familiarity with many terms. This unique dictionary includes over 4,000 definitions and illustrations from the computer graphics world, including those from digital filmmaking, animation, programming, mathematics, holography, photorealism, lighting, character creation, game development, modeling, and more.

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By Anistatia Miller

Brand: Rockport PublishersHardcover (160 pages)

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Product Description:What does a client or art director really mean when they say "I want a clean look" or "The design should be bold"? Graphic Design Speak offers the answers in an easy-to-follow format that both clients and designers can use as points of reference in design briefs or strategy meetings. This book is an essential tool for any designer seeking to gain a better knowledge of the wants and needs of their clients.

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